Dynamo-electric machine and method of operating same.



N0. 630,490. Patented Aug. 8, I899. M. DERI.

DYNAMO ELECTRIC MACHINE AND METHOD OF OPERATING SAME.

(Application filed June 30, 1898.) No Modal.) 2 Sheets-Sheet l.

W E BY M Ln UW 4 H\SATTORNEY6 No. 630,490. Patented Aug. 8, I899.

M. DERI.

' DYNAMO ELECTRlC MACHINE AND METHOD OF OPERATING SAME.

(Application filed June 30, 1898.\ (N0 Model.) 2 Shee'ts sheet 24 WITNESSES: I I INVENTOR %& Max 11m HiSATTORNEYS.

UNITED STATES PATENT OFFICE,

MAX DERI, or VIENNA, AUSTRIA-HUNGARY.

DYNAMO-ELECTRIC MACHINE AND METHOD OF OPERATING SAME.

srscxrxcarron forming m of LettersiPatent rmesoAeo, dated August 8, 1899.

Application filed June 30,1898. SerialNc. 684,846. mamas.) a

To all whom it may concern. 1

-Be it known that 1, MAX Diml, engineer, a subject of the Emperor of Austria-Hungary, residing at Vienna, in the Province of Lower Austria, in the Empireof Austria-Hungary,-

have invented certain new and useful improvements in the method of combined application of continuous and alternating currents for exciting magnetic fields and combination apparatus for producing by this method electrical energy and mechanical power; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled -in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters and figures of reference marked thereon, which form a part of this specification. a

This invention relates to the combination, in a dynamo, ofi-two different arrangements for exciting the magnetic field and for the induced member, whereby the machine is enabled to produce simultaneously continuous current and alternating current (monophase or polyphase) or to be worked as a motor by both descriptions of currents or, again, to operate as a motor-generator for converting the one. kind of current into the other. When operatingas generator of continuous current or as continuous-current motor, this machine works in the ordinary way, with commutator or collector and brushes. When working as alternate-current generator or alternate-current motor, it operates with short-circuited armature. The two different actions are produced by one single armature and one fieldmagnet excited simultaneously by continuous current and alternating current.

.The arrangements by which the combined action is produced will be understood from the following examples.

In the accompanying drawings, Figure 1 is a diagram illustrating my invention, and Fig. 2 is a diagram of a modification.

the armature. The field-magnet has two groups of windings. The field-windings from s to s are connected so as to produce four consecutive poles (at s S, s 5 s s", and s s') and form, as shown'by the arrows indicating the magnetic flow of force,a quadripolar field. These windings take up the current frourC in the described sequence-that is, according to the present example, simple alternating current is taken from a transformer T and led into the field-winding at s and The field-windin gs from s toss, on the other hand, are so connected that'they only produce two series poles(at' s"-s andat s 83 and form a bipolar field. To these windings is supplied a continuous current through (I -at s and 3 for example'-from a battery 13. While (in the present example four and two,).'the electromotive forces induced intheir windings or coils neutralize each other so that the sum of them in one group is nil. This holds good upon the presumption that the field-coils subjected to induction are arranged in series. In the inducing field-windings the number of north and south poles is naturally equal, so that the action of the flow of force which the north poles exert on the otherfield-windings is also equal to,but the opposite of the action of,the flow of force of the south poles. If the coils subjected to induction are connected in parallel, the above condition holds good for no inducing action of one group of windings on the other can occur, notwithstanding that the groups of windings s s and s s have a common field-magnet and to a certain extent the same directions of lines of force. By this arrangement it is therefore possible bypassdifferently-disposed groups of windings to excite simultaneously in one field-magnet two kinds of magnetic field without the one destroying or influencing the other. In the present instance the groups of windings are so and a bipolar constan-tfield are produced.

In an analogous manner instead of an alternating field a rotatoryfield can be produced simultaneously with the'constant field by using instead of the exciting simple alternating current 0 a polyphase alternating cur rent. There is thus obtained the combina- ,,tion of a rotatory constant field with a staboth fields have .diiferent-numbers of poles,

each separate'branch circuit. Consequently 5 ing currents of different kinds through two disposed that a quadripolar alternating field tionary constant field, which likewise eaert nati ng current in the field-windingit it be noinducing action on each other if the nu mberof their poles lee-different.

It is clear that according to the arrangements here described'the two kinds er, excita. tionof field-magnet may, be produced consecutively instead of'simultaneousiy,-in which casecommon field-windings with correspond.

- ing change of connection-'Ifordiflerent numfrom-continuous-cu'rrent excitation to altersecutive .tlonr bers of poles can be employed for the con Fig. 2will'serve toilinstratehow the change mating-current excitation may be efiected.

"Thus the coils S 8,, &c., ma'y be connected in ser'ies with a continuous-current source,

such as a battery B-, producing two poles, or, 1

on the other hand, may be connected up in four poles. This-may be done by throwing the three-pole switchU to the left, as shown by full lines, or to the right, as shown by dotted lines, as will be readily understood.-

The armature A, which is shown in the drawings as'a drum-armature, but maybe a ring-armature, is provided with awinding which analogouslyto the field-coils. is disdetermined series in groups of four-for ex- I on the other hand,'are connected with each ,posed intwo difierent groupings for fourand two poles. As shown in the drawings, the" wires t, on theone hand, are connected ina ample, t, tit", and t-'and' form a number of short circuited-four-wire windings with -'re- 'spectto the four-polar alternating field. The

pointsil and 1, 2and 2", 41:0,, whichare equipotential with respect tothe four-polarfield,

other or with a connecting circuit in su'ch'a way that the current flowing from 1 tol", 2

r-If now the equipotential pointsare connected among themselvesand with the sect'ors of a to 2', -&c., produces a-bipolar armature-field.

collector in the determined sequence, as in the known drum-windingof dynamo-ma chines, (in this'case sho'wn'in the s'eries 1 3' 3', 5 5f, 7 7',-2 2f, 44, 6' 6',-1;1.',). and thecolle'ctor-brushes be placed in the proper positions,

the-armature forms with the above-described arrangement a continuous-current armature,

. of thc'usual kind,-which produces acontinuou's currentin' a bipolar constant field, or when fed with a continuous c'urrenffo'rms a bipolar-motor armature. In the drawings the collector brushestare shown connected with the leads ,from a continuous-curi-ent source Ciorexa'mple, a bstteryB. It now the two windings oLthe held-armature are excited, the four-polar onewlthan alternatingcurrent, the bipolar one' wi tha continu-.

motive torce or it can give rise to an alter continuous alternate c'urrent excita-' tu'i'e through-the brushes, it can pr'oducea momentand fmotive power by means of, the constant field-of the armature. The twofold -'function,as already observed-,ican proceed'at the same time without mutual disturbance,

and each of the two functions can be regu lat'edwithoutinii-uencing the other.

condition toproduce simultaneously or alter- "nately continuous current and alternating.

By this; I arrangement the apparatus is therefore' in acurrent, .or to exert powerasa motor driven simultaneously or alternately-by a continuous current and by an alternating current, or to operate onthe one hand asan otor, on the- .other'handasa. generator, and thus operate as a converter for transforming an alternating currentintoa continuous current or a contihuouscurrent into an alternating current. In this converter'the press'ure'of thesecond- My current is not dependent on that of the primary current, for. the pressure of the continuous current produced will be proportional to 'the'number of windingsof the-armature,- which, on the contrary, 'is without influence on the 'functionas an -inductiommotor, since the armature -wind i ng for the last-named function isused short-circuited.

In .the example de'scribedand shown there tare-four poles for the alternatingfield and two I poles for the coiistant field. 1 Obviously, however, other numbers of poles instead of two and 'four can be used The described combinations-and their double mode of workingis possible iffor .the 'excitingcoutin'uous current there be. chmeu an'bvexi number of poles and tor the exciting alternatingcurrent also an even number of poles,-buta different one from the above. The constant field mayhave a=smaller number of'poles than the'alternatr iiig field, or vic'eversa; 1

'Inlthe example here described, the arrange ment is so chosen that the field-magnet rb-Z mains stationary and'the armature rotatesj 'butnnder certain conditions this arrange- .ment maybe reversed; So, also, the manner of winding-and the layers of the windings and coils on the field-magnet.,and the armature-- and'their number; construction, andfermare" without importance. They are I determined by the known rulei'or constructingdynamo machines and electromotors.

I claim-'- I p 7 v '1. A combination currenten'erator or-mo torha'ying a field-magnet'w-it coils combined with a continuousrcurrent source and an alternating-current source, one to produce a constant field and the other an alternating held, with rliil'er'ent numbers of poles inthe same field 'magnet, and an armature provided with windings forming on the one hand short eso,4eor i a circuits having me. number of poles correspending with the alternating field andforn ing on the other handotlier circuits withuthe number of poles corresponding-with the constant' field, all substantially as described.

2. The mode herein described of operating a combination electric generator or motor'having two sets of field-coils consisting in sup-v plying an alternate current to one set of field coils producing thereby an alternating field and supplying a constant current tothe other set of field-coils producing therebya constant ence of two subscribing witnesses. 1 MAX'DERL I Witnesses: HENRY" O.- CARPENTER,

CHAS. E. CARPENTER. 

